It's currently 34 degrees and supposed to frost tonight, so I wanted to bump this thread... any suggestions?

I don't have any experience with these. I hope they are doing okay! Have you tried calling up a local botanical garden or a good nursery? Someone must know the answer.

I'm afraid that there's no good local nursery :-( I emailed the local extension office, too, but no reply.

My guess is that the bulbs go dormant and it really doesn't matter. What value could a saucer of ice bring it? But I had one last year that I'd sat in the unheated greenhouse without a saucer, and it died. That could be an unrelated coincidence... or I could be totally wrong and it needs the saucer even if it freezes.

Your climate is so different from mine, and I don’t grow Pitcher plants, but my experience has been that container plants do better over winter if they’re not kept wet and cold — whether inside/protected or outdoors. Being in freezing water would be the worst. I’m in z5 and I overwinter potted plants both indoors and out. If they’re staying out, I remove the plant from the pot and plunge it into the garden over winter. Can you do that?

Maybe try a local college? There must be a botanist lurking somewhere.

I like party_music's planting out idea. Whatever you do, if it were me I wouldn't put them all in the same spot. I did see a reference online to some of these at least as being deciduous. That might make it easier to just bring them in. But really, I'd keep looking for a botanist. There was a whole page on nature dot org on them. So people are interested.

Good luck with them!